Agree about the women's game, however they're just re-jigging teams that are already there (the ones that play in the Charlotte Edwards cup) so it's actually pointless.
In terms of the "best parts of the Hundred", I'm actually not sure what the best parts are? A bit of extra gaudy branding and giving away free tickets to boost the crowds?
I think the cricket has to be sectioned into mini-seasons, the formats are so different that it impacts the players. They used to mix it all a few years back and it got a bit messy. The Blast should definitely be played at the height of summer, and probably concurrently with the 50 over stuff. T20 on the weekends (Friday to Sunday), 50 over during the week.